Exam 3: Basic Logical Concepts

Josie has ski racks on her Toyota Pathfinder. It is logical to assume, therefore, that Josie is a skier. This argument is

Ollie got violent ill only minutes after he ate a large red mushroom in the woods. Clearly, the mushroom caused him to be sick. This argument is

No categorical syllogism has only one premise.

What makes me think Regina isn't a vegetarian? On Tuesday, she went to Kentucky Fried Chicken for lunch. On Wednesday, she went to Burger King for lunch. On Thursday, she went to the Hungry Heifer Steakhouse for lunch. What more proof do you need? This argument is

__________ have the following pattern: If A then B; not B; so, not A.

Every hypothetical syllogism is valid.

Which of the following combinations can a valid argument never have?

In 1930 Harry lived at 212 Sycamore Drive. In 1970 Harry lived at 212 Sycamore Drive. In 2010 Harry lived at 212 Sycamore Drive. Therefore, in 2040 Harry will live at 212 Sycamore Drive. This argument is

Every sound argument has a true conclusion.

If Wendy got an "A" in her Anatomy and Physiology class, then her boyfriend took her out to celebrate. Her boyfriend did take her out to celebrate. Therefore, Wendy did get an "A" in her Anatomy and Physiology class. This argument is

Arguments in which the conclusion is claimed to follow probably from the premises are

Every hypothetical syllogism has two premises and a conclusion.

Every chain argument is valid.

With a deductive argument, if you can imagine a possible scenario in which an argument's premises would all be true and the conclusion would be false, then the argument is:

Modus ponens is a valid pattern of reasoning.

Some valid arguments have false conclusions.

Some arguments, while not completely valid, are mostly valid.

If an argument contains the words "it must be the case that," then the argument is definitely

Modus tollens is a deductively valid pattern of reasoning.

If an argument is unsound, then it has at least one false premise.